Basin-type insulator loosening vibration detection method for combined electric appliance

Abstract

The invention relates to a basin-type insulator loosening vibration detection method for a combined electric appliance. The method is technically characterized by comprising the steps of calculating the vibration signal frequency spectrum of an acceleration vibration sensor and the vibration signal frequency spectrum of a force hammer; dividing the vibration signal frequency spectrum of the acceleration vibration sensor by the vibration signal frequency spectrum of the force hammer to obtain a frequency response curve of the basin-type insulator; and comparing the frequency response curve of the tested basin-type insulator with the frequency response curve of a reference basin-type insulator to accurately judge whether the tested basin-type insulator has a loosening fault or not. The equipment used in the invention is small, is convenient to carry and detect, is not electrically connected with the tested equipment, and has no influence on the running state of the equipment. According to the method, the vibration test technology is added into the electrical equipment fault diagnosis method, and compared with an electrical detection electrical equipment fault diagnosis method, faulthidden dangers can be found earlier.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis of power transmission and transformation equipment, in particular to a method for detecting looseness and vibration of basin-type insulators of combined electrical appliances. Background technique [0002] Gas-insulated combined electrical equipment is a complete set of electrical devices composed of a variety of high-voltage electrical installations, main wiring and system functions. It encapsulates common equipment in substations such as busbars, voltage transformers, current transformers, lightning arresters, isolating switches, circuit breakers, etc. through a cylinder filled with high-voltage SF6 insulating gas, so as to achieve strong system, high integration, It has the characteristics of small footprint and good reliability, and is widely used in power systems of various voltage levels from 66 to 1000kV. [0003] Although the reliability of combined electrical appliances is strong...

AI Technical Summary

Problems solved by technology

[0003] Although the reliability of combined electrical appliances is strong, various faults emerge one after another as the usage continues to increase. Among them, a very common and harmful fault is the loose pot insulator fault. This fault is very hidden when it first occurs. It is not easy to find, but the consequences it can cause are very serious. First, it will cause the leakage of SF6 insulating gas. This gas is poisonous and harmful to the human body. Once it leaks, it will endanger the health of the staff.

In addition, this kind of failure will accelerate the damage of equipment and cause discharge, short circuit, open circuit and other failures, so early detection and early treatment are very necessary

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